Researchers are looking at ways to get kids to pick healthier foods in their school cafeterias. One middle school found that when they put chocolate milk 6 inches behind white milk, many kids suddenly opted for the white milk instead. The school pictured wasn't involved in the study. Toby Talbot/AP hide caption

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Ben Rapoport takes Erin Wyner's pulse as she runs on a treadmill to determine how many carbohydrates she should eat to run a successful marathon. Richard Knox/NPR hide caption

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Tyrone Harvey, 43, of Washington, left, talks with his doctor Gail Nunlee-Bland, M.D., about his diabetes. Harvey uses a cell phone to help manage his disease. Jacquelyn Martin/AP hide caption

toggle caption Jacquelyn Martin/AP

Scientists hope a soy-based, curry-flavored snack food will appeal to malnourished Indian kids. Courtesy of Dr. Soo-Yeun Lee hide caption

toggle caption Courtesy of Dr. Soo-Yeun Lee

Scientists discovered stones for grounding flour in Italy used 30,000 years ago by hunter gatherers. Istituto Italiano di Preistoria e Protostoria hide caption

toggle caption Istituto Italiano di Preistoria e Protostoria

As you walk, body weight passes through the base of the big toe. So that's where your shoe should bend. Courtesy of Emily Cook hide caption

toggle caption Courtesy of Emily Cook

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